Non-stick ceramo-metallic coating for cooking utensils

Abstract

The invention concerns a non-stick coating ( 4 ) for cooking utensils ( 1 ) characterized in that it is selected among the group comprising (a) ceramics alone selected among titanium oxynitride, titanium suboxides, titanium subnitrides, spinels, mixed spinels; and (b) ceramo-metallic mixtures wherein the ceramics are selected among titanium oxynitrides, titanium suboxides, titanium subnitrides, spinels, cerium fluoride, silicon carbide, pyrolitic carbon, boron carbide, and the metal is titanium.

What is claimed is:  
     
       1. A nonstick coating for cooking utensils comprising ceramo-metallic mixtures, the ceramo-metallic mixtures include a ceramic being a member elected from the group consisting of titanium oxynitrides, titanium suboxides, titanium subnitrides spinels, mixed spinels, cerium fluoride, silicon carbide, pyrolitic carbon, and boron carbide, and a et al, the metal is titanium; wherein the metal is in particles, a size of the metal particles is less than 60 μm and the ceramic is in particles, a size of the ceramic particles is less than 30 μm. 
     
     
       2. The coating as claimed in  claim 1 , wherein the coating has a hardness greater than 900 Vickers. 
     
     
       3. The coating as claimed in  claim 1 , wherein the coating has pores less than 10 μm 2 . 
     
     
       4. The coating as claimed in  claim 1 , further comprising a plurality of surface undulations forming peaks separated by at least 60 μm and with slopes of about 120° to 180° with respect to a horizontal midline. 
     
     
       5. A nonstick coating for cooking utensils comprising ceramo-metallic mixtures, the ceramo-metallic mixtures include a ceramic being a member selected from the group consisting of titanium oxynitrides, titanium suboxides, titanium subnitrides spinels, mixed spinels, cerium fluoride, silicon carbide, pyrolitic carbon, and boron carbide, and a metal, the metal is titanium, wherein an amount of metal in the ceramo-metallic mixture is between 20% and 80% and the metal is in particles, a size of the metal particles is less than 60 μm and the ceramic is in particles, a size of the ceramic particles is less than 30 μm. 
     
     
       6. The coating as claimed in  claim 5 , wherein the coating has hardness greater than 900 Vickers. 
     
     
       7. A nonstick coating for cooking utensils comprising ceramo-metallic mixtures, the ceramo-metallic mixtures include a ceramic being a member selected from the group consisting of titanium oxynitrides, titanium suboxides, titanium subnitrides spinels, mixed spinels, cerium fluoride, silicon carbide, pyrolitic carbon, and boron carbide, and a metal, the metal is titanium, wherein an amount of metal in the ceramo-metallic mixture is between 20% and 80% and the coating has pores less than 10 μm 2 . 
     
     
       8. The coating as claimed in  claim 5 , wherein the coating has pores less than 10 μm 2 . 
     
     
       9. The coating as claimed in  claim 2 , wherein the coating has pores less than 10 μm 2 . 
     
     
       10. The coating as claimed in  claim 7 , further comprising a plurality of surface undulations forming peaks separated by at least 60 μm and with slopes of about 120° to 180° with respect to a horizontal midline. 
     
     
       11. The coating as claimed in  claim 5 , further comprising a plurality of surface undulations forming peaks separated by at least 60 μm and with slopes of about 120° to 180° with respect to a horizontal midline. 
     
     
       12. The coating as claimed in  claim 2 , further comprising a plurality of surface undulations forming peaks separated by at least 60 μm and with slopes of about 120° to 180° with respect to a horizontal midline. 
     
     
       13. The coating as claimed in  claim 3 , further comprising a plurality of surface undulations forming peaks separated by at least 60 μm and with slopes of about 120° to 180° with respect to a horizontal midline.